a UV problem?

KING-TAHARKA · 10-05-2009, 09:29 AM

Hello guys,

I bet it has been posted before, but I couldn’t find it.

I finally got some time to get into texturing some of my models to see how it feels to have a finished piece.

But while I was trying to generate normals from a Zbrush sculpt I faced this problem here.

I thought that is because of my UV distribution, but I got the same result after trying different UV layouts.

It will be great if anyone can share some ideas here.

Thanks.

Talon · 10-05-2009, 09:31 AM

Try inverting the green channel of the normal map.

KING-TAHARKA · 10-05-2009, 10:34 AM

Thanks Talon.

But the problem remains... I must be doing something wrong.

KING-TAHARKA · 11-05-2009, 04:15 AM

just to show what happend:

Daltons · 11-05-2009, 04:33 AM

It´s like you have overlapping uv´s? That left and right side is just mirrored. And if so, it will show like you have there. Otherwise I don´t know whats wrong.

Pankake · 11-05-2009, 04:46 AM

Aaaah, yes. It's a mirrored normal map seam, it's fixable.

Check this out.

EDIT:

On further inspection, it doesn't look like the mirrored normal map seam error, it looks like the inverted lighting bug. This is only present on really old normal map shaders, what shader are you using to display your normals?
And I'm assuming this is a tangent-space normal map? Mirroring geometry with object-space is physically impossible as far as I know.

KING-TAHARKA · 11-05-2009, 06:13 AM

Thanks guys,

It’s not a mirrored normal map seam.

pankake: it is a tangent space NM and i am using max's 2009 standard fx shader.

Do I have to see some other shaders?

Also thanks for that link... awesome tutorial... it helped me in some other work I am doing, but not this one.

Pankake · 11-05-2009, 06:29 AM

Yeah, I'd say you should get a proper viewport shader, Xoliul's or Doylle's will do.

Xoliul boasts his is like 500,000 times better, and that Doylle's is smelly, so yeah, the choice is clear.

3DS Max 2009's is clunky, old and basic (2010's has been rebuilt and is more up-to-standard with today's techniques).

KING-TAHARKA · 11-05-2009, 08:31 AM

I will definitely do that... I already have the (god damn goes down better) Xoliul shader, so I will post what will happen fixed or not soon.

Also I wish to try that marmoset toolbar everybody talks about ones I finish downloading it maybe later this year… thanks to the super sonic link they provided.

Cheers.

KING-TAHARKA · 11-05-2009, 11:40 PM

so i used the Xoliul shader and the result was great:

but wait a minute... the problem remains:

10-05-2009, 09:29 AM	#1 (permalink)
KING-TAHARKA Senior Member 238 - 27	A normal map problem? Hello guys, I bet it has been posted before, but I couldn’t find it. I finally got some time to get into texturing some of my models to see how it feels to have a finished piece. But while I was trying to generate normals from a Zbrush sculpt I faced this problem here. I thought that is because of my UV distribution, but I got the same result after trying different UV layouts. It will be great if anyone can share some ideas here. Thanks. __________________ Narrow minded people generalizes characteristic intends...? CREATURE SKETCH WORK STEPS Last edited by KING-TAHARKA; 12-07-2009 at 03:21 AM.

10-05-2009, 09:31 AM	#2 (permalink)
Talon Industry Artist 3,798 - 1,396	Try inverting the green channel of the normal map. __________________ > My Portfolio > Supporter of good crits.

10-05-2009, 10:34 AM	#3 (permalink)
KING-TAHARKA Senior Member 238 - 27	Thanks Talon. But the problem remains... I must be doing something wrong. __________________ Narrow minded people generalizes characteristic intends...? CREATURE SKETCH WORK STEPS

11-05-2009, 04:15 AM	#4 (permalink)
KING-TAHARKA Senior Member 238 - 27	just to show what happend: __________________ Narrow minded people generalizes characteristic intends...? CREATURE SKETCH WORK STEPS Last edited by KING-TAHARKA; 12-07-2009 at 03:21 AM.

11-05-2009, 04:46 AM	#6 (permalink)
Pankake Senior Member 1,734 - 461	Aaaah, yes. It's a mirrored normal map seam, it's fixable. Check this out. EDIT: On further inspection, it doesn't look like the mirrored normal map seam error, it looks like the inverted lighting bug. This is only present on really old normal map shaders, what shader are you using to display your normals? And I'm assuming this is a tangent-space normal map? Mirroring geometry with object-space is physically impossible as far as I know. __________________ Good Crit! Aaron Clifford London, UK Sketchbook thread Aaron Clifford Portfolio Last edited by Pankake; 11-05-2009 at 05:19 AM.

11-05-2009, 04:33 AM	#5 (permalink)
Daltons New Member 38 - 2	It´s like you have overlapping uv´s? That left and right side is just mirrored. And if so, it will show like you have there. Otherwise I don´t know whats wrong.

11-05-2009, 06:13 AM	#7 (permalink)
KING-TAHARKA Senior Member 238 - 27	Thanks guys, It’s not a mirrored normal map seam. pankake: it is a tangent space NM and i am using max's 2009 standard fx shader. Do I have to see some other shaders? Also thanks for that link... awesome tutorial... it helped me in some other work I am doing, but not this one. __________________ Narrow minded people generalizes characteristic intends...? CREATURE SKETCH WORK STEPS

11-05-2009, 06:29 AM	#8 (permalink)
Pankake Senior Member 1,734 - 461	Yeah, I'd say you should get a proper viewport shader, Xoliul's or Doylle's will do. Xoliul boasts his is like 500,000 times better, and that Doylle's is smelly, so yeah, the choice is clear. 3DS Max 2009's is clunky, old and basic (2010's has been rebuilt and is more up-to-standard with today's techniques). __________________ Good Crit! Aaron Clifford London, UK Sketchbook thread Aaron Clifford Portfolio

11-05-2009, 08:31 AM	#9 (permalink)
KING-TAHARKA Senior Member 238 - 27	I will definitely do that... I already have the (god damn goes down better) Xoliul shader, so I will post what will happen fixed or not soon. Also I wish to try that marmoset toolbar everybody talks about ones I finish downloading it maybe later this year… thanks to the super sonic link they provided. Cheers. __________________ Narrow minded people generalizes characteristic intends...? CREATURE SKETCH WORK STEPS

11-05-2009, 11:40 PM	#10 (permalink)
KING-TAHARKA Senior Member 238 - 27	so i used the Xoliul shader and the result was great: but wait a minute... the problem remains: __________________ Narrow minded people generalizes characteristic intends...? CREATURE SKETCH WORK STEPS Last edited by KING-TAHARKA; 12-07-2009 at 03:22 AM.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode